HMS Hood's armour layout

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Bgile
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Re: HMS Hood's armour layout

Post by Bgile » Tue Feb 01, 2011 1:38 am

Tiornu wrote:Didn't Alaska also have gradations in her barbette armor?
I think this must be a feature restricted to new ships, at least as far as the Americans are concerned. I'm looking at Nevada, and her barbettes have the same thickness all around.
I wonder whether it required more advanced metallurgy or if it was more expensive.

RobertsonN
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Re: HMS Hood's armour layout

Post by RobertsonN » Tue Feb 01, 2011 8:56 am

One can also see this point in the transverse bulkheads.
Those of the Iowa were 11.3 in thick. According to Friedman in US battleships this was proof for battle ranges provided the ship was more than 50 deg from dead ahead of its oppenent (or within 40 deg from abeam). Even the mighty Yamato had quite heavily graded barbette armor. It was probably a question of mimization of risk to the ship taking into account its intended tactical use. It would not have made much sense to have the barbettes (the rear barbette is not shielded by anything on three turret ships and any shielding of B by A is very dependent on angle and range, the front of A is likewise unshielded) immune within that 50 deg sector when the bulkheads were not.

Bgile
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Re: HMS Hood's armour layout

Post by Bgile » Tue Feb 01, 2011 5:28 pm

True enough, and most battleships seem to be more vulnerable from the ends.

Tiornu
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Re: HMS Hood's armour layout

Post by Tiornu » Tue Feb 01, 2011 8:38 pm

Yeah, I was thinking the same thing about bulkheads. If you look at Yamato's bulkheads, you can see the designers struggling to consider a wide range of bearings.

Ski206
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Re: HMS Hood's armour layout

Post by Ski206 » Fri Oct 18, 2019 6:47 pm

I know this thread is rather old but hopefully I’ll get a response. In a post above a link is provided at admirals.org to a RN study of the immunity zones of their capital ships to the German 15”shell dated 1939. That link no longer works. Does anyone know where that paper can be found today?

Mostlyharmless
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Re: HMS Hood's armour layout

Post by Mostlyharmless » Thu Nov 07, 2019 1:00 pm

Ski206 wrote:
Fri Oct 18, 2019 6:47 pm
I know this thread is rather old but hopefully I’ll get a response. In a post above a link is provided at admirals.org to a RN study of the immunity zones of their capital ships to the German 15”shell dated 1939. That link no longer works. Does anyone know where that paper can be found today?
It seems to be available via the Internet Archive at https://web.archive.org/web/20180819100 ... 1-9387.php

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